app/present: major rewrite; integrate org-tree-slide for org presentations

modules/app/present/autoload.el

@@ -1,25 +1,90 @@
 ;;; app/present/autoload.el
 
+;; --- impatient-mode -------------------------------------------------------------
+
 ;;;###autoload
-(defun +present/buffer ()
+(defun +present/impatient-mode ()
   (interactive)
   (require 'simple-httpd)
   (unless (process-status "httpd")
     (httpd-start))
-  (unless impatient-mode
-    (impatient-mode +1)))
+  (impatient-mode)
+  (if impatient-mode
+      (add-hook 'kill-buffer-hook '+present--cleanup-impatient-mode)
+    (+present--cleanup-impatient-mode)))
+
+(defun +present--cleanup-impatient-mode ()
+  (unless (cl-remove-if-not (lambda (buf) (buffer-local-value 'impatient-mode buf))
+                            (doom-buffer-list))
+    (httpd-stop)
+    (remove-hook 'kill-buffer-hook '+present--cleanup-impatient-mode)))
+
+
+;; --- org tree slides ------------------------------------------------------------
+
+(defvar +present--overlays-list nil)
+
+;;;###autoload
+(defun +present/org-tree-slides ()
+  (interactive)
+  (unless (derived-mode-p 'org-mode)
+    (error "Not in an org buffer"))
+  (call-interactively 'org-tree-slide-mode)
+  (add-hook 'kill-buffer-hook '+present--cleanup-org-tree-slides-mode))
+
+;;;###autoload
+(defun +present|add-overlays ()
+  (add-to-invisibility-spec '(+present))
+  (save-excursion
+    ;; hide org-mode options starting with #+
+    (goto-char (point-min))
+    (while (re-search-forward "^[[:space:]]*\\(#\\+\\)\\(\\(?:BEGIN\\|END\\|ATTR\\)[^[:space:]]+\\).*" nil t)
+      (+present--make-invisible
+       (match-beginning 1)
+       (match-end 0)))
+    ;; hide stars in headings
+    (goto-char (point-min))
+    (while (re-search-forward "^\\(\\*+\\s-\\)" nil t)
+      (+present--make-invisible (match-beginning 1) (match-end 1)))))
+
+;;;###autoload
+(defun +present|remove-overlays ()
+  (mapc 'delete-overlay +present--overlays-list)
+  (remove-from-invisibility-spec '(+present)))
+
+(defun +present--cleanup-org-tree-slides-mode ()
+  (unless (cl-remove-if-not (lambda (buf) (buffer-local-value 'org-tree-slide-mode buf))
+                            (doom-buffers-in-mode 'org-mode))
+    (org-tree-slide-mode -1)
+    (remove-hook 'kill-buffer-hook '+present--cleanup-org-tree-slides-mode)))
+
+(defun +present--make-invisible (beg end)
+  (let ((overlay (make-overlay beg end)))
+    (push overlay +present--overlays-list)
+    (overlay-put overlay 'invisible '+present)))
+
+(defun +present--detect-slide ()
+  (outline-show-all)
+  (if (member "title" (org-get-tags-at))
+      (text-scale-set 10)
+    (text-scale-set +present-scale)))
+
+
+;; --- misc -----------------------------------------------------------------------
+
+(defvar +present--original-font +doom-font)
 
 ;;;###autoload
 (define-minor-mode +present/big-mode
   :init-value nil
   :lighter " BIG"
   :global t
-  (if +present-big-mode
+  (if +present/big-mode
       (set-frame-font +present-big-font t t)
-    (set-frame-font +present-original-font t t)))
+    (set-frame-font +present--original-font t t)))
 
 ;;;###autoload
-(defun +present/stream ()
+(defun +present/resize-frame-for-stream ()
   "Resize the frame pixelwise, so that it fits directly into my livecoding.tv
 streaming layout."
   (interactive)

modules/app/present/config.el

@@ -1,17 +1,25 @@
 ;;; app/present/config.el
 
-;; Sometimes you just get that powerful urge to show off. I don't have a fancy
-;; car, so Emacs will have to do.
+;; Sometimes you just get that urge to show off. I don't have a fancy car, so
+;; my code or Emacs will have to do.
+;;
+;; Sometimes I stream my work on liveedu.tv, or record it on youtube, or peer
+;; program over skype/teamviewer, or present at talks -- for all of this, Emacs
+;; is my solution.
 ;;
 ;;  + `impatient-mode' lets me show off code, as I write it, in real-time over
 ;;    HTTP (see `+present/buffer')
 ;;  + `ox-reveal' adds a reveal.js exporter to org-mode
+;;  + `org-tree-slide' for presenting org buffers as slides, plus some hacks to
+;;    unclutter them.
 ;;  + and `+present/big-mode' lets me toggle big fonts for streams or
 ;;    screen-sharing
 
-;; Fonts for `+present/big-mode'
-(defvar +present-original-font +doom-font)
-(defvar +present-big-font (font-spec :family "Fira Mono" :size 16))
+(defvar +present-big-font (font-spec :family "Fira Mono" :size 18)
+  "Font to use when `+present/big-mode' is enabled.")
+
+(defvar +present-scale 7
+  "The `text-scale-amount' for `org-tree-slide-mode'.")
 
 
 ;;
@@ -21,12 +29,80 @@
 (def-package! impatient-mode
   :commands impatient-mode)
 
-;; reveal.js
-(when (featurep! :lang org)
+
+(def-package! centered-window-mode
+  :commands centered-window-mode
+  :config
+  (setq cwm-use-vertical-padding t
+        cwm-frame-internal-border 110
+        cwm-left-fringe-ratio -10
+        cwm-centered-window-width 240))
+
+
+(when (featurep! :lang org) ;; reveal.js
   (if (bound-and-true-p org-modules-loaded)
       (require 'ox-reveal)
     (add-hook! 'org-load (require 'ox-reveal)))
 
   (setq org-reveal-root "http://cdn.jsdelivr.net/reveal.js/3.0.0/"
-        org-reveal-mathjax t))
+        org-reveal-mathjax t)
+
+  (def-package! org-tree-slide
+    :commands org-tree-slide-mode
+    :init
+    (after! org
+      (map! :map org-mode-map
+            "<f8>" '+present/org-tree-slides
+            "<f7>" '+present/next))
+    :config
+    (setq org-tree-slide-skip-outline-level 2
+          org-tree-slide-activate-message " "
+          org-tree-slide-deactivate-message " "
+          org-tree-slide-modeline-display nil)
+    (org-tree-slide-simple-profile)
+
+    (map! :map org-tree-slide-mode-map
+          [right] 'org-tree-slide-move-next-tree
+          [left]  'org-tree-slide-move-previous-tree)
+
+    (add-hook! 'org-tree-slide-mode-after-narrow-hook
+      '(+present|detect-slide +present|add-overlays org-display-inline-images))
+
+    (add-hook! 'org-tree-slide-mode-hook
+      (doom/window-zoom)
+      (let ((arg (if org-tree-slide-mode +1 -1)))
+        (when (featurep 'doom-themes)
+          (doom-buffer-mode (* arg -1)))
+        (centered-window-mode arg)
+        (window-divider-mode (* arg -1))
+        (doom-hide-modeline-mode arg)
+        (cond (org-tree-slide-mode
+               (org-indent-mode -1)
+               (text-scale-set +present-scale)
+               (ignore-errors (org-preview-latex-fragment '(4)))
+               (set-face-attribute 'org-level-2 nil :height 1.4))
+              (t
+               (org-indent-mode +1)
+               (text-scale-set 0)
+               (org-remove-latex-fragment-image-overlays)
+               (set-face-attribute 'org-level-2 nil :height 1.0)
+               (+present|remove-overlays)
+               (org-remove-inline-images)))))
+
+    (defun +present*org-tree-slide-narrow-exclude-header (orig-fn &rest args)
+      (cl-letf (((symbol-function 'org-narrow-to-subtree)
+                 (lambda () (save-excursion
+                         (save-match-data
+                           (org-with-limited-levels
+                            (narrow-to-region
+                             (progn (org-back-to-heading t)
+                                    (forward-line 1)
+                                    (point))
+                             (progn (org-end-of-subtree t t)
+                                    (when (and (org-at-heading-p) (not (eobp))) (backward-char 1))
+                                    (point)))))))))
+        (apply orig-fn args)))
+    (advice-add 'org-tree-slide--display-tree-with-narrow
+                :around '+present*org-tree-slide-narrow-exclude-header)))
+
 

modules/app/present/packages.el

@@ -1,6 +1,8 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; app/present/packages.el
 
+(package! centered-window-mode)
 (package! htmlize)
 (package! impatient-mode)
+(package! org-tree-slide)
 (package! ox-reveal)

modules/private/hlissner/+bindings.el

@@ -126,7 +126,7 @@
      :desc "Fullscreen"             :n "f" 'doom/toggle-fullscreen
      :desc "Indent guides"          :n "i" 'highlight-indentation-mode
      :desc "Indent guides (column)" :n "I" 'highlight-indentation-current-column-mode
-     :desc "Impatient-mode"         :n "h" '+present/buffer
+     :desc "Impatient mode"         :n "h" '+present/impatient-mode
      :desc "Big mode"               :n "b" '+present/big-mode)
 
    (:desc "Tmux/Terminal"